Four-sided shimable indexable shear tip boot

ABSTRACT

A one piece four-sided hardened steel boot tip is mounted to a distal end upper jaw tang of a heavy duty demolition. The boot tip has a front wall seated on the tang front edge and a right side wall seated on the shear side tang face and radiused or curved rear seat. A top wall has a radiused inside top wall that sits on the radiused tang top seat. A bottom wall of the boot tip has a radiused inside top wall that is seated on the tang radiused bottom seat forming a shear punching edge between the front wall and the bottom wall. The boot tip has a shear side shearing edge that is between the sidewall and the bottom wall of the boot tip. An access or side plate is seated on the guide side tang face, a portion of the radiused boot bottom wall and the radiused rear seat. The side plate is flush with the bottom and front walls. The boot tip right side and access plate have matching apertures therethrough and alignable with the tang apertures to secure the boot and access plate to the tang for encapsulating protection thereof from the lower jaw shear side, the guide side and the tie plate as the upper jaw moves into and out of the recess therebetween. One or more shims may be provided that are insertable inside the boot against the tang faces and clampable thereto after the faces have become worn or otherwise requires adjustment for maximum clamping force.

RELATED APPLICATIONS

The present application is a Continuation-In-Part of U.S. applicationSer. No. 14/261,591, filed Apr. 25, 2014, now U.S. Pat. No. 9,713,848.

BACKGROUND OF THE INVENTION

The present invention relates to demolition equipment and moreparticularly to heavy duty demolition shears for reducing building andconstruction materials to scrap for recycling.

Demolition of buildings and steel structures has become important wherespace is needed to build new structures while the demolishment of suchstructures must be efficient and be able to reduce all materials to asmall enough size for recycling and eventual reuse of metals once melteddown and reformed. Burying of scrap materials is simply not even anoption anymore. In fact, reprocessing of metal materials from demolitiondestined for scrape yards for recycling has become a huge business.

Demolition shears have become an important tool for demolition jobs.Bridges and large buildings have significant amounts of metal support,metal reinforced concrete and other metal reinforced structures. Suchmetal pieces are large and often have multiple connections. Cutting ofthese metals by saw, grinder or torch has become way too impractical,expensive and hazardous. Demotion shears are used to punch throughmetals and shear the metal structures into small pieces. In fact, metaldemolition shears are used to cut metal cables, reinforced concrete, carparts, rods, rebar, rail cars, tanks, pipes, channels and other vehicleframes. Demolition shears can easily shear up to sixteen inch I-beamsinto small pieces that are only a couple of feet long or less andreadily usable for recycling once reduced in size.

Demolition shears are typically mounted on the distal end of a boomstructure or dipper stick on a backhoe or excavator. By thisarrangement, the shear is actually mobile and capable of moving about ademolition site as well as reaching elevated positions up high in a safemanner. The operation of the shears with one movable and one fixed (ormovable) jaw is by hydraulic cylinders.

Prior art FIGS. 1 through 2B generally show the structure of ademolition shear. FIG. 1 shows a prior art heavy duty demolition shear10 with a frame 12 supporting a lower jaw 14 and pivot 16. The lower jaw14 has a shear blade side 18, a guide blade side 20 and a cross, tie orchin plate 22 forming a recess 23 therebetween. An upper jaw 24 isconnected to the fame 12 and lower jaw 14 at pivot 16. A hydrauliccylinder or actuator 26 also is connected to the frame 12 and a rearportion of the upper jaw 24 The upper jaw 24 has a shear blade side 28,a guide blade side 30 with a distal end shear tip or tang 32. Inoperation, the upper jaw 24 with replaceable shear blades, passes intothe recess 23. In this shear, there is a replaceable shear tip 34 weldedonto the end of the upper jaw 24 at its tip or tang 32. The tip 34 needsto be periodically replaced as the shear tip becomes worn as it punchesthrough material to be reduced and further shears along the distal shearblade, distal guide blade and cross cutter blade. Replacement is handledby cutting off the tip 34, suitably with a torch, and welding on a newshear tip 34. Over more time, the upper jaw distal end or tang 32becomes so worn that it must be cut off and a new tip must be welded on.

In FIGS. 2 through 2B is another prior art heavy duty demolition shear40 with a lower jaw 42, pivot 44, shear blade side 46, guide blade side58 and a tie plate 50 forming its recess 52 therebetween. The upper jaw54 has a shear blade side 56, guide blade side 58 and a tang 60. Thetang 60 has a front edge 60 a, side faces 60 b, top seat 60 c, rear seat60 d and bottom seat 60 e. In this case, the tang 60 is somewhat moreprotected from the work piece to be sheared and shear blade edges alongthe lower shear blade, guide blade and cutter blade with replaceableL-shaped shear tip sections 64. Here the distal end of the upper jaw 54and front edge 60 of the tang 60 are not protected at all. In time withuse, the tang side faces 60 b become worn down requiring tightening ofthe L-shape shear tip sections 64 which detrimentally causes the shorterlower L sections to open up and rotate inward at their top therebycausing the cutting edges to move laterally outward which may cause theshear tip portions to break as they strike the distal lower shear blade46 or guide blade 48. Total clamping force action between the shear tipor tang 60 and the shear tip sections 64 is absolutely required for theshear tip and tang to work properly together and for the tang 60 to notwear out prematurely. It can be costly to replace these worn parts andsuch repair efforts require the shear 40 to be taken out of operation.

There is a need for a shear tip that encompasses or encapsulates most,if not all, of the shear tang that is substantially one-piece and isadjustable with shims, to insure complete and total clamping forcebetween the shear tang and the shear tip piece or pieces and to minimizetang side face wear and assure proper alignment of the shear tip on thetang to avoid shear tip breakage.

SUMMARY OF THE INVENTION

A one piece four-sided hardened steel boot tip for a distal end upperjaw tang of a heavy duty demolition shear having a upper movable shearjaw with a shear tip or tang, a shear side and a guide side pivotallyconnected to a lower fixed or movable shear jaw with a shear blade side,a guide side, a distal tie plate and a recess therebetween. The tang hasa front edge, side faces with apertures therethrough, a radiused topseat, a radiused rear seat and a radiused bottom seat. The boot tip hasa front wall seated on the tang front edge and a right side wall seatedon the shear side tang face and radiused rear seat. A top wall has aradiused inside top wall that sits on radiused top seat. A bottom wallof the boot tip has a radiused inside top wall that is seated on thetang radiused bottom seat forming a shear punching edge between thefront wall and the bottom wall. A shear side shearing edge is betweenthe sidewall and the bottom wall of the boot tip. An access or sideplate is seated on the guide side tang face, a portion of the radiusedboot bottom wall and the radiused rear seat. The side plate us flushwith the bottom and front walls. The boot tip right side and accessplate have matching apertures therethrough and alignable with the tangapertures to secure the boot and access plate to the tang for protectionthereof from the lower jaw shear side, the guide side and the tie plateas the upper jaw moves into and out of the recess. One or more shims areprovided and insertable inside the boot against the tang faces andclampable thereto after the faces have become worn or otherwise requiresadjustment for maximum clamping force. An extendable boss maybeinsertably located on the lower inside face of the side plate as toindex and interlock with a matching indexing bolt or boss recess on tankguide side face. A portion of the lower edge of the side plate has aguide side shearing edge.

A principle object and advantage of the present boot tip invention isthat it completely protects all surfaces and edges of the upper jaw tangof a heavy duty demolition shear which otherwise becomes worn over timeand hence down time for the shear.

Another object and advantage of the present boot tip invention is theavailable shims for use against the tang faces as they become worn toinsure maximum clamping force and alignment of the boot tip and tangfaces which is otherwise diminished as the tang edges and faces wear.

Another object and advantage of the present boot tip invention is thatshims have not been used with upper jaw shear tips or tangs before.Shims are important as they increase the clamping power necessary as tonot wear down the tang side surfaces and compensate for manufacturingirregularities, tolerances and tang wear which is very common.

Another object and advantage of the present boot tip invention is theavailable shims for use against the tang faces as they become worninsure that the shear tip or boot tip pieces are properly positioned andaligned with each other which otherwise may be subject to breakage, orpoor shearing or cutting.

Another object and advantage of the present invention is that the bootis three or four sided lending significant integrity and strength to theboot tip as well as assuring an exact fit about the tang as heretoforenot known.

Another object and advantage of the present invention is that the boottip top wall with the bolt clamp force resist retraction forces to holdonto the upper jaw as boot tip and the upper jaw moves out of the lowerjaw recess.

Another object and advantage of the present invention is that theextendable boss on the lower inside face of the side plate indexes andinterlocks with a matching indexing circular slot or recess on the tangguide side face of the bottom wall which secures the plate in place asto not swing up and away from its seat.

Another object and advantage of the present invention is that a portionof the side plate indexes onto the bottom wall which further secures theplate in place as to not swing up and away from its seat.

Another object and advantage of the present invention is that the guideside tang face has a protruding hub that indexes with a radiused portionof the side plate to further assure the side plate stays in place.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a prior art heavy duty demolition shear;

FIG. 2 is a perspective view of another prior art heavy duty demolitionshear partially broken away;

FIG. 2A is a right side perspective view of the upper jaw partiallybroken away of the prior art heavy duty demolition shear of FIG. 2;

FIG. 2B is a left side perspective view of the upper jaw partiallybroken away of the prior art heavy duty demolition shear of FIG. 2;

FIG. 3 is a perspective view of the 3-sided shear tip boot of thepresent invention;

FIG. 4 is a front elevation view of the 3-sided shear tip boot;

FIG. 5 is a right elevation view of the 3-sided shear tip boot;

FIG. 6 is a bottom plan view of the 3-sided shear tip boot;

FIG. 7 is a rear elevation view of the 3-sided shear tip boot;

FIG. 8 is a left elevation view of the 3-sided shear tip boot;

FIG. 9 is a top plan view of the 3-sided shear tip boot;

FIG. 10 is a left rear perspective view of the 3-sided shear tip boot;

FIG. 11 is a right perspective view of the access plate for the 3-sidedshear tip boot;

FIG. 12 is a left perspective view of a shim for the 3-sided shear tipboot;

FIG. 13 is a right perspective view of the prior art heavy dutydemolition shear of FIG. 2 partially broken away with the 3-sided sheartip boot, shims and access plate in exploded condition;

FIG. 14 is a right perspective view of the prior art heavy dutydemolition shear of FIG. 2 partially broken away with the 3-sided sheartip boot, shims and access plate assembled on the shear;

FIG. 15 is a left perspective view of the prior art heavy dutydemolition shear of FIG. 2 partially broken away with the 3-sided sheartip boot, shims and access plate in exploded condition;

FIG. 16 is a left perspective view of the prior art heavy dutydemolition shear of FIG. 2 partially broken away with the 3-sided sheartip boot, shims and access plate assembled on the shear;

FIG. 17 is a perspective view of a 4-sided shear tip boot secondembodiment of the present invention;

FIG. 18 is a front elevation view of the 4-sided shear tip boot;

FIG. 19 is a right elevation view of the 4-sided shear tip boot;

FIG. 20 is a bottom plan view of the 4-sided shear tip boot;

FIG. 21 is a rear elevation view of the 4-sided shear tip boot;

FIG. 22 is a left elevation view of the 4-sided shear tip boot;

FIG. 23 is a top plan view of the 4-sided shear tip boot;

FIG. 24 is a left rear perspective view of the 4-sided shear tip boot;

FIG. 25 is a right perspective view of the access plate for the 4-sidedshear tip boot;

FIG. 26 is a left perspective view of the access plate for the 4-sidedshear tip boot;

FIG. 27 is a left perspective view of a heavy duty demolition shearpartially broken away with the 4-sided shear tip boot, shims and accessplate in exploded condition;

FIG. 28 is a left perspective view of the heavy duty demolition shear ofpartially broken away with the 4-sided shear tip boot, shims and accessplate assembled on the shear;

FIG. 29 is a right perspective view the heavy duty demolition shearpartially broken away with the 4-sided shear tip boot, shims and accessplate in exploded condition;

FIG. 30 is a right perspective view of at heavy duty demolition shearpartially broken away showing the assembled goot tip mounted on the tangstructure;

FIG. 31 is a left side perspective view of another tip and tangstructure as to slidably receive a third embodiment of a 4-side boot tipof the present invention;

FIG. 32 is an exploded front right view of the 4-sided shear tip bootand the inside surface of side plate showing the boss that will indexinto the guide side tang face to hold the side place in place whenshearing;

FIG. 33 is an exploded front left view of the 4-sided shear tip boot andthe side plate rotated outwardly showing the outside face of the sideplate and the indexing boss;

FIG. 34 is a right perspective view of the upper jaw of heavy dutydemolition shear of FIG. 31 partially broken away with the 4-sided sheartip boot, shims and side plate assembled onto the shear tip;

FIG. 35 is a left perspective view of the upper jaw of heavy dutydemolition shear of FIG. 31 partially broken away with the 4-sided sheartip boot, shims and side plate assembled onto the shear tip; and

FIG. 36 is an upside down left side perspective view of the thirdembodiment of the 4-sided boot tip assemble on the upper jaw shear tang.

DETAILED SPECIFICATION

Prior art demolition shears 10 and 40 have been previously discussedabove as shown in FIGS. 1-2B. The main focus of this invention is in thearea of the upper jaw 24, 54, at their distal end from the pivot 16, 44in the area known as the shear tang 32, 60. The tang 32, 60 is a part ofa shear 10, 40 that is highly subject to shearing and punching forces,excessive wear, alignment issues and requires periodic maintenance. Thepresent invention encapsulates the tang 32, 60 to protect it from wearand to continue to assure that the maximum possible clamping forcesbetween the tang 32, 60 and the shear tip boot 70, 180.

Referring to FIGS. 3 through 10, the three-side shear tip boot 70 may beseen which will clamp onto the tang side faces 60 b shown in FIGS. 2Aand 2B with bolts 73. The boot tip 70 is made from proprietarywear-resistant hardened steel. The boot tip 70 has a seamless front faceor wall 72 with panel sections 72 a, 72 b, 72 c, and 72 d (FIG. 4). Theright side or wall 74 has a lower reinforced portion 76, twohorizontally aligned and recessed bolt/nut apertures 78, and an upperportion 80 with two substantially vertically aligned and recessedbolt/nut apertures (FIG. 5). The bottom sidewall 90 has a boot punchingedge 92 for punching through a flat work piece, a shear boot edge 94 forshearing with the lower jaw distal shear blade and a trailing boot edge96 leading directly to flush arrangement with the upper jaw distal shearblade (FIG. 6). The rear view (FIG. 7) shows the rear side 100 of theboot tip 70 with a tang cavity 102 bounded by front wall 72, right wall74 and bottom wall 90. The left side 110 also shows the tang cavity 102,bottom wall 90, front wall 72 and right wall 74 (FIG. 8). The top side120 (FIG. 9) shows the front wall 72, right wall 74, bottom wall 90,left side 110 and tang cavity 102. The rear perspective view (FIG. 10)shows front wall 72, right wall 74, bottom wall 90 and tang cavity 102.

FIG. 11 shows the side or access plate 110 also made of a proprietarywear-resistant hardened steel. Plate 110 closes the open left side 110when in position. Plate 110 has two substantially vertical threadedapertures 112 and two horizontal threaded apertures 114 which willthreadingly receive bolts 73 when passed through the boot tip right sidewall 74 apertures, tang apertures and thread into access plate 110.Access plate 110 is flush with the left side when assembled on the tang60.

FIG. 12 shows a novel shim 120 with apertures 122 alignable withapertures in boot tip 70, tang 60 and side plate 110. Shims 120 have notbeen used with upper jaw shear tips or tangs before. Shims 120 are madefrom high quality sheet steel available in thicknesses starting with0.001 of an inch graduating a few thousandth of an inch in thicknessesdepending on tang surface wear. Shims 120 may also be tapered inthickness if needed for shear tip 70 alignment and adjustments on tang60.

Referring to FIGS. 13 through 16, the assembly of boot tip 70, optionalshims 120, 166 and access or side plate 110 onto tang 60, 160 ofdemolition shear 130 may be appreciated. Demolition shear 130 has alower jaw 132 with a pivot 134. Lower jaw 132 has a shear blade side 136with distal shear blade 138, a guide blade side 140 with a distal guideblade 142 and a cross plate 144 with a cross blade 146 all forming arecess 150 therebetween. Upper jaw 154 has a shear blade side withdistal shear blade 158 and a guide blade side 157.

Upper jaw 154 has a distal end or shear tang 160 with a front edge 160a, side faces 160 b, rear seat 160 c, bottom seat 160 d and top seat 160e. The tang faces 160 b have two substantially vertical apertures 162and two horizontal apertures 164. Shims 166 (similar to 120) withmatching apertures 168 are optionally shown in position for assembly.Threaded bolts 73 secure the boot tip 70, shims 166 and access plate 110about tang 160 as the boot tip 70 and access plate 110 rest and aresupported in rear seat 160 c, bottom seat 160 d and top seat 160 e. Ifthe tang faces 160 b become worn, additional or thicker shims 160 may beemployed with the boot tip 70 assembly to assure that the greatestclamping force is applied to the tang 160, as access plate 110 is flushwith boot tip left side 110. Plate 110 is also supported by front wall72 and bottom wall 90 of the boot tip 70 as well as the tang rear seat160 c and top seat 160 e.

FIGS. 17 through 24 show another or second embodiment of the inventionas a four-sided shear tip boot 180 which additionally covers the topside of the shear tang 270 discussed below in FIGS. 27 through 30. Thisboot tip 180 is also made from proprietary wear-resistant hardenedsteel. The boot tip 180 has a seamless front face or wall 182 with panelsections 182 a, 182 b and 182 c (FIG. 18). The right side or wall 188has a lower reinforced portion 190 and four vertical or diagonalbolt/nut apertures 192 in the upper portion 194 (FIG. 19). The bottomside or wall 198 has a boot punching edge 200 for punching through aflat work piece, a shear boot edge 202 for shearing with the lower jawdistal shear blade and a trailing boot edge 204 leading directly toflush arrangement with the upper jaw distal shear blade (FIG. 20). Therear view (FIG. 21) shows the rear side 208 of the boot tip 180 withtang cavity 210 bounded by front wall 182, right wall 188, bottom wall198 and top wall 183. The left side 218 also shows the tang cavity 210,bottom wall 198, front wall 182, right wall 188 and top wall 183 view(FIG. 22). The top side wall 183 (FIG. 23) shows the front wall 182 c,b. The rear perspective view (FIG. 24) shows front wall 182, right wall188, bottom wall 198, top wall 183 and tang cavity 210.

FIGS. 25 and 26 shows the access or side plate 230 also made of aproprietary wear-resistant hardened steel. Plate 230 closes the openleft side 218 when in position. Plate 230 has four vertical or diagonalthreaded apertures 230 which will threadingly receive bolts 184 whenpassed through the boot tip right sidewall 188, tang apertures 272 andthread into access plate 230. Boss 234 is for distal shear blade bolt274, which indexes in tang guide side face 270 b which further adds toclamping power to the tang 270.

Referring to FIGS. 27 through 30, the assembly of four-sided boot tip180, optional shims 276, 278 and access plate 230 onto tang 270 ofdemolition shear 250 may be appreciated. Four-sided boot tip 180 is slidonto tang 270 from the shear blade side of the upper jaw 264. Demolitionshear 250 has a lower jaw 252 with a pivot 254. Lower jaw 252 has ashear blade side 256 with distal shear blade 265, a guide blade side 258with a distal guide blade 267 and a cross plate 260 with a cross blade269 all forming a recess 262 therebetween. Upper jaw 264 has a shearblade side 266 with distal shear blade and a guide blade side 268.

Upper jaw 264 has a distal end or shear tang 270 with a front edge 270a, side faces 270 b, top seat 270 c rear seat 270 d and bottom seat 270e. The tang faces 270 b have four diagonal apertures 272. Optional shims276, 278 with matching apertures 280 are shown in position for assembly.Threaded bolts 184 secure the boot tip 180, shims 276, 278 and sideplate 230 about tang 270 as the boot tip 180 and side plate 230 rest andare supported in rear seat 160 d, bottom seat 160 e and top seat 160 c.If the tang faces 270 b become worn, additional or thicker shims 276,278 may be employed with the boot tip 180 assembly to assure that thegreatest clamping force is applied to the tang 270. Upper or top wall183 assists in holding the boot tip 180 in place when the upper jaw 264is moved out of the recess 262. As side or access plate 230 is flushwith boot tip left side 218. Plate 230 is also supported by front wall182, bottom wall 198 and top wall 183. Side plate 230 may also have anindexing boss 234 (FIG. 29) to index into tang 270 for furthersecurement.

In operation, the adjustable shear boot tips 70, 180 with shims 120,276, 278 are assuredly always in proper alignment with the shear tang160, 270 as the shear 130, 250 punches and shears a workpiece as theupper jaw 154, 264 passes by the lower jaw 132, 252 and into recess 150,262. This proper alignment assures that upper jaw 154, 264 goes into andcomes out of recess 150, 262 without striking any part of the lower jar132, 252. Tang 160, 270 wear and manufacturing tolerances can becompensated for with shims 120, 276, 278 which have not been used beforein this arrangement.

Referring to FIGS. 31 through 36, another or third embodiment of thefour-side shear tip boot 370 may be seen. The upper jaw 354 of a shearhas a tang 360 with a front edge 360 a, side faces 360 b, rear seat 360c, radiused bottom seat 360 d, radiused top seat 360 e, radiused hub orcurb seat 360 f, boss seat 360 g and apertures 362.

The assembly of boot tip 370, optional shims 120, 166 and access or sideplate 410 onto tang 60 or 160 of demolition shear 40, 130 are similar tothe previous boot tip assemblies 70 and 180.

The third embodiment four-sided boot tip 370 has a front face or wall372, a top wall 373 with radiused inside top wall 373.5 and a rightsidewall 374 with apertures 375 therethrough which will clamp onto thetang side faces 360 b as shown in FIGS. 2A and 2B with bolts 73. Boottip 370 additionally has a bottom wall 390 with radiused inside bottomwall 398. A tang cavity 391 is formed by front face or wall 373, topwall 373, right sidewall 374 and bottom wall 390. The boot tip 370 issimilarly made from proprietary wear-resistant hardened steel. Thebottom side or wall 390 has a boot punching edge 392 for punchingthrough a flat work piece at the juncture of the bottom wall 390 and thefront wall 372. The right side wall 374 at the bottom wall 390 also hasa shear side shearing edge 394 for shearing with the lower jaw distalshear blade 138. The shear tip boot 370 is slid onto tang 270 from theshear blade side of the upper jaw 264. The rear edge or hub 400 of theright guide blade sidewall 374 will index and seat on the guide bladeside tang face rear seat 360 c and oppositely radiused hub or curb seat360 f. The inside rearwardly sloping bottom wall 398 will index and seaton the tang radiused bottom seat 360 d. The inside radiused top wall373.5 will index and seat on tang readiused top seat 360 e.

The side plate 410 is also made of a proprietary wear-resistant hardenedsteel. Plate 410 closes the open left side of the boot tip 370 when inposition on tang 360. Plate 410 has threaded apertures 412 which willthreadingly receive bolts 73 when passed through the boot tip right sidewall 374 apertures 375, tang apertures 362 and threaded into side plate410 apertures 412. Side plate 410 also has a rear edge 416 with radiusedindexing hub 418 to fit into the radiused hub seat 360 f of rear seat360 d of tang 360. Side plate 410 has a radiused top edge 420 to seat onthe inside radiused top seat 373.5 of the tang 360. Side plate 410 has abottom edge 424 that has a forward radiused portion 426 as to seat onthe radiused inside bottom wall 398. The lower inside radiused boss cutout 428 receives a boss 430 which will index in the tang guide side faceboss seat 360 g to further assure that the side plate 410 stays inposition. There is also a rear guide blade shearing edge 432 on theplate bottom edge. Side plate 410 is flush with and has its bottom edge424, 426 siting on the radiused bottom wall 398 when assembled on thetang 360. This arrangement further indexes and interlocks the boot tip370 and side plate 410 together so that the side plate 410 does notscizzor upwardly and/or outwardly possibly striking the cross plate 144or cross blade 146 or guide side shear blade 142.

Shims 120, 166, as previously described, ′ may also be used with thisembodiment and are made from high quality sheet steel available inthicknesses starting with 0.001 of an inch graduating a few thousandthof an inch in thicknesses depending on tang surface wear. Shims 120 mayalso be tapered in thickness if needed for shear tip 370 clampingadjustments on tang 60.

The above embodiments are for illustrative purposes. Other shearstructures may use the shear tip and shims of the present invention. Thefollowing claims define the true scope of this invention.

What is claimed:
 1. A boot tip assembly for a distal end tang of ademolition shear having a upper movable shear jaw with a shear side anda guide side pivotally connected to a lower shear jaw with a shear bladeside, a guide side, a distal tie plate and a recess therebetween whereinthe tang has a front edge, side faces with apertures therethrough, a topcurved seat, a rear curved seat and a bottom curved seat, the boot tipassembly comprising: (a) a one piece four-sided boot tip comprising: (i)a front wall adapted to be seated on the tang front edge; (ii) a topwall with a curved inside top wall adapted to be seated on the curvedtang top seat; (iii) a right sidewall adapted to be seated on the shearside tang face and the rear curved tang seat; (iv) a bottom wall with ashear punching edge between the front wall and the bottom wall, aforward guide side shearing edge and a shear side shearing edge betweenthe right sidewall and the bottom wall with a curved inside bottom walladapted to be seated on the curved tang bottom seat; and (b) a sideplate with a guide side rearward lower shearing edge and a forwardcurved bottom edge adapted to be seated on the curved inside bottom walland the guide side tang face, having a top edge adapted to be seated onthe curved inside top wall and a curved rear edge adapted to be seatedon the curved tang rear seat, with the right sidewall and the side platehaving matching apertures therethrough and alignable with the tangapertures to adaptably secure the boot tip to the tang in flusharrangement with bolts, the front, right side, bottom and top wallstogether with the side plate defining a tang cavity for encapsulationand protection of the tang from the lower jaw shear side, the guide sideand the tie plate as the upper jaw moves through the recess.
 2. The onepiece four-sided hardened steel boot tip assembly of claim 1, furthercomprising boss on an inner face of the side plate adapted forinterlocking with the guide side of the tang side face.
 3. The one piecefour-sided hardened steel boot tip assembly of claim 1, furthercomprising one or more shims with matching apertures adapted to beinsertable in between the boot tip against one of the tang faces and theside plate secured thereto with the bolts.
 4. The one piece four-sidedhardened steel boot tip assembly of claim 3, wherein the shims are madeof sheet steel.
 5. A boot tip assembly for a distal end tang of ademolition shear having a upper movable shear jaw with a shear side anda guide side pivotally connected to a lower shear jaw with a shear bladeside, a guide side, a distal tie plate and a recess therebetween whereinthe tang has a front edge, side faces with apertures therethrough, a topcurved seat, a rear curved seat and a bottom curved seat, the boot tipassembly comprising: (a) a one piece four-sided boot tip comprising: (i)a front wall adapted to be seated on the tang front edge; (ii) a topwall with a curved inside top wall adapted to be seated on the curvedtang top seat; (iii) a right sidewall adapted to be seated on the shearside tang face and the rear curved tang seat; (iv) a bottom wall with ashear punching edge between the front wall and the bottom wall, aforward guide side shearing edge and a shear side shearing edge betweenthe right sidewall and the bottom wall with a curved inside bottom walladapted to be seated on the curved tang bottom seat; (b) at least oneshim adapted to be insertable in between the boot tip against one of thetang faces; and (c) a side plate with a guide side rearward lowershearing edge and a forward curved bottom edge adapted to be seated onthe inside bottom wall and the guide side tang face, having a top edgeadapted to be seated on the curved inside top wall and a curved rearedge adapted to be seated on the curved rear tang seat, with the rightsidewall, the at least one shim and the side plate having matchingapertures therethrough and alignable with the tang apertures to securethe right side wall, the at least one shim and the side plate to thetang in flush arrangement with bolts, the front, right side, bottom andtop walls together with the at least one shim and the side platedefining a tang cavity for encapsulation and protection of the tang fromthe lower jaw shear side, the guide side and the tie plate as the upperjaw moves through the recess.
 6. The one piece four-sided hardened steelboot tip assembly of claim 5, further comprising boss on an inner faceof the side plate adapted for interlocking with the guide side of thetang side face.
 7. The one piece four-sided hardened steel boot tipassembly of claim 5, wherein the at least one shim is made of sheetsteel.
 8. A boot tip assembly for a distal end tang of a demolitionshear having a upper movable shear jaw with a shear side and a guideside pivotally connected to a lower shear jaw with a shear blade side, aguide side, a distal tie plate and a recess therebetween wherein thetang has a front edge, side faces with apertures therethrough, a topcurved seat, a rear curved seat and a bottom curved seat, the boot tipassembly comprising: (a) a one piece four-sided boot tip comprising: (i)a front wall adapted to be seated on the tang front edge; (ii) a topwall with a curved inside top wall adapted to be seated on the curvedtang top seat; (iii) a right sidewall adapted to be seated on the shearside tang face and the rear curved tang seat; (iv) a bottom wall with ashear punching edge between the front wall and the bottom wall, aforward guide side shearing edge and a shear side shearing edge betweenthe right sidewall and the bottom wall with a curved inside bottom walladapted to be seated on the curved tang bottom seat; (b) a side platewith a guide blade side rearward lower shearing edge and a forwardcurved bottom edge adapted to be seated on the curved inside bottom walland the guide side tang face, having a top edge adapted to be seated onthe curved inside top wall and a curved rear edge adapted to be seatedon the curved tang rear seat, with the right sidewall and the side platehaving matching apertures therethrough and alignable with the tangapertures to secure the top, right and bottom walls and the side plateto the tang in flush arrangement with bolts, the front, right side,bottom and top walls together with the side plate defining a tang cavityfor encapsulation and protection of the tang from the lower jaw shearside, the guide side and the tie plate as the upper jaw moves throughthe recess; and (c) a boss on an inner face of the side plate adaptedfor interlocking with the guide side of the tang side face.
 9. A boottip assembly for a distal end tang of a demolition shear having a uppermovable shear jaw with a shear side and a guide side pivotally connectedto a lower shear jaw with a shear blade side, a guide side, a distal tieplate and a recess therebetween wherein the tang has a front edge, sidefaces with apertures therethrough, a top curved seat, a rear curved seatand a bottom curved seat, the boot tip assembly comprising: (a) a onepiece four-sided boot tip comprising: (i) a front wall adapted to beseated on the tang front edge; (ii) a top wall with a curved inside topwall adapted to be seated on the curved tang top seat; (iii) a rightsidewall adapted to be seated on the shear side tang face and the rearcurved tang seat; (iv) a bottom wall with a shear punching edge betweenthe front wall and the bottom wall, a forward guide side shearing edgeand a shear side shearing edge between the right sidewall and the bottomwall with a curved inside bottom wall adapted to be seated on the curvedtang bottom seat; (b) at least one shim adapted to be insertable inbetween the boot top and one of the tang faces; (c) a side plate with aguide side rearward lower shearing edge and a forward curved bottom edgeadapted to be seated on the curved inside bottom wall and the guide sidetang face, having a top edge adapted to be seated on the curved insidetop wall and a curved rear edge adapted to be seated on the curved reartang seat, with the boot tip, including the right sidewall, the at leastone shim and the side plate having matching apertures therethrough andalignable with the tang apertures to secure the boot assembly to thetang in flush arrangement with bolts, the front, right side, bottom andtop walls together with the side plate defining a tang cavity forencapsulation and protection of the tang from the lower jaw shear side,the guide side and the tie plate as the upper jaw moves through therecess; and (d) boss on an inner face of the side plate adapted forinterlocking with the guide side of the tang side face.
 10. A demolitionshear with a one piece four-sided hardened steel boot tip assembly, thedemolition shear, comprising: (a) an upper movable shear jaw with adistal end tang, a shear side and a guide side pivotally connected to alower shear jaw with a shear blade side, a guide side, a distal tieplate and a recess therebetween wherein the tang has a front edge, sidefaces with apertures therethrough, a top curved seat, a rear curved seatand a bottom radiused curved seat; and the boot tip assembly comprising:(a) a one piece four-sided boot tip comprising: (i) a front wall adaptedto be seated on the tang front edge; (ii) a top wall with a curvedinside top wall adapted to be seated on the curved tang top seat; (iii)a right sidewall adapted to be seated on the shear side tang face andthe rear curved tang seat; (iv) a bottom wall with a shear punching edgebetween the front wall and the bottom wall, a forward guide sideshearing edge and a shear side shearing edge between the right sidewalland the bottom wall with a curved inside bottom wall adapted to beseated on the curved tang bottom seat; and (b) a side plate with a guideside rearward lower shearing edge and a forward curved bottom edgeadapted to be seated on the curved inside bottom wall and the guide sidetang face, having a top edge adapted to be seated on the curved insidetop wall and a curved rear edge adapted to be seated on the curved tangrear seat, with the right sidewall and the side plate having matchingapertures therethrough and alignable with the tang apertures to securethe boot tip with the side plate to the tang in flush arrangement withbolts, the front, right side, bottom and top walls together with theside plate defining a tang cavity for encapsulation and protection ofthe tang from the lower jaw shear side, the guide side and the tie plateas the upper jaw moves through the recess.